File-milling cutter



II. II. sL/IIE'II.

i FILE IVIILLING CUTTER. APPLICATION FILED 'MAY I3. 1921.

ILA Patented Oct.. M, w22. I

@gf l To @ZZ whom. t mag .it ,y

A possible dit l ri'er of Figure 1 showing the llt \ carrier assembled as in lit is satisfactory Vliable to get out of order.

Fatented @et di,

.t u l t i di .l i

" nanvnr nonnal snarnnfor carence, attracts rrnn-rirrne centran.

' ,application .tiled May '1 3 coe/wcm: Y i

Be it known t at l, llanvnr .Bonner Sparta, a 'citizen of the United States residin at Chicago, in the county of ook and tate of lllincis, have invented-a certain new and useful improvement. in'File-Milling Cutters, of which the 4following 1s va specification. t p

'lhis invention relates to the manufacture of tiles. 'llhe object of the invention is to provide a machineby which the necessary undercut file teeth may be formed upon an ordinary file by the use of a rotating cutter,

better and more satisfacand doing it more cheaply than 1s by methods heretofore used, such for instance as the use of a shaper.

The inventionconsists in mechanism capable of attaining the foregoing obyects which can be easily' and cheaply made, which in use, and is not readily 'lhe invention further consists in many features and etails of construction hereafter more fully set forth in the ,specification and claims.

Referring to the drawings-in which like numerals denote several views, f a

Figur'el'is' a side elevation of a complete 'tory file machine illustrating this invention 1nl its preferred form.

Figure 2 is a plan view of the work carposition and one method of attaching the file thereto,

Figure 8 is a vertical section through a portion of the cutting tool', tile and work Figure l.

Figure l is a fragmentary sectionthrough a le which this machine is capable of producing.

'lhe ordinary commercial hic, a sample of which is shown in the drawing., is a rectangular strip or blank of metal l very', much thinner in one direction than in the other, vand provided on one or 'both ofthe faces with diagonally disposed teeth l2, undercut with reference 'to the base line lll at a proper angle 16 as indicated in Figure 4:.

When undercut'iile notches 18 are cut from thev blank with 'a rotary or milling cutter which absolutely cuts od and carries away the material initially in said notch spaces, a very much more accurate and conse uently better file is produced than is possib e where the teeth are tion of a scraping or tearing tool such as `carried by standards 32 like parts throughout the may be formed by the ac-V rear.' sena-1 no. iee,oaa.

ltruncated 'conical form. rlfhis cutting tool or wheel is provided with circumferentially the conventional. sloepen 'lhe improved file cutting mechanism 4desirable result includes the shaft 20'rota- Un this shaft is mounted a atv parallel cutting teeth 24 of substantially the.

same width corresponding to the Elel teeth 12 to be formed. ln the practical form of construction shown in Figure l this cutting tool 22 is made up of a pluralit of laminated disks held in place on the s aft 2U by any suitable means as for instance collars 28, but the details of the construction of the cutting wheel are immaterial and enter into this invention. 'lhe shaft 20 is rotatablyA mounted in suitable bearings 3() from a suitably supported ing an upper surface 35 a plane through the shaft 20, the standards 32 and the base so that a moving plane object traveling over the base transversely of the shaft and initially contacting the cutting wheel 22, will in all positions of movement continue to contact that wheel until said plane object is passed entirely out of reach of the wheel. For convenience, the shaft is described as horizontal.,l standards 32 as vertical, and so forth, but obviously the entire machine placed at any angle thus distorting its relationship between vertical and horizontal without departing from this invention. Formed in this base 34 and extendin across the axis4 of shaft 20 is a guiding trac i 36 in which is reciprocatably mounted a carriage 38 adapted to be moved by any suitable means as for instance the conventional shaft Lt0 and hand wheel Ll2 in aplane parallel to the upper ,surface of the -base 3d. Suitably mounted von this carriage 38 is main base 3d hav- `a work carrying block having an upper plane surface all inclined in a plane through the axis of the shaft 2() at an angle to the shaft 20 corresponding to theangularityof the conical surface of the cutting wheel 22, but otherwise parallel with the upper' surface 35 of the base Bllwith the result that as the wheel 42 and shaft/l0 move the carrier 38 transversely of tact with the cutting Wheel 22 will remain do notv the shaft, an object placed on the upper surface 44: and in conrising vertically at right anglesto t ste-ntiaiiy the --line contact Wien in Contact with tlist Wheel until the carrier has carried such cbject entirely beyond lie reeclr of the Wheel.,

The singularity ci the per surface Lili of the tool cerriege 38 with reference te each other is mec-snred by angle 46 which is exactly equel to the en le le which indicates 'the undercut of the le tooth l2,

Angulerly disposed the surfeceV iliere suitable securingdevices for e, ie Iolenlr sc inet such file blank may be attached to this surface e4; in e position angular to the exis el? the shaft, enel enguler to the path ci travel oi the carriage correspending to the desired enguierity oi" the teeth l2 cn the ie to "ce formed, In the particule? cese nere iliustreted such securine devices take the ferm ci clips i8 end; bote 50.

the complete cperetien ci the device, the operetcr iirst'plsces the iile l0 en elle upper surface @i *ofthe cerrieif 38 in sciincsiticn ci ignrc 2, ce incliceted, end. then tightens up the clips e8. He then starts shaft 20 to cause cutting tcci 22 to rctete emi. by manipulating handle i2 causes tile carrier and steamed perts ce nieve along tracks Se nntii the file bccly l0 is moved freni. ene side ci cutting' tcci te the other. 2in sc' cicing the proper tile undercni, 'teeth l@ therein. Y iien this is ccmpieted, the operator nes cniy te release clips 4:8 remove the ccnn pleteiy cui, nie..

Hering time described my invention, when i claim new end desire te seciire by Letters is:

l. in e inecnine the class described,

rotary conical iiie cutaing ecol, ineens pesitioning e biene: diegcnsliy in two clirections te the exis the cutting tec?. end means for tiren. moving ene ci scid members with reference te tire @einer in. such Ine-nner there the tcei cuts uncle-,rens 'teeth in the ile bisnlr.,

2. in s meciiine fier tile per csc describeci, e rctetebie conicel cutting techaving about ics circumference i'iie cwtti teeth, e carrier member movable transversely of the exis of scifi cutting' tccfl lievi'ng e Werk can rying surface ci tne'scine degree ci eng-n ierity to tile shaft the cutting tccl but cppositely disposed with reference tc the cutting tcci se es te ineke substsntieily e ne teni aicng iss length, ineens for securing e iile bienir to be cut cn the surface ci the tooi cerrier et an angle 'to the direction ci increment of seid tccl carrier enel to the exis of the cutin" tool, enel ineens for naci/ing the carrier, )fier elle purposes set forth.

3. iin mechanism ci the ciess described, c nase having e tre/cir in which s tool carries1 may reciprocate in one directien, e tool cer- Lees sheie and this up? eiigular to the shcf; in piene shroueh he its own path of travel opposite corners of' `surface disposed the teeth @il form y ,ece

rier so reciprccetcbie over the. bese, means for se reciprocating the tool carrier, a rotstebc sliet mounte et e distance from end trenerersely te the path ci tcci. ceri-ie serle carrying fece en 'tcoi csr exis cf the shaft ami cfsiicrwise parallel te as 'the carrier moves, ineens securing e file blenic en seid surfeA -f et en angle diegcnal te the exis of the sli". i, enel e ccnicei file cute the shaft of the same ange, f as that ef the upper surface of the file ce.,y rier adapted to contcct e iile lolzinl on the carrier and as the file bis le: is nicved across the cutting tool to unclcicut enguifrly dis posee teeth in the file bfi nl;

e. in e machine for the purpose described, rctetable conical cuting wheel licving'; about its circumference cut e" 'teeth con? forming' to the angular-ity ci che file teeth to be formed, e carrier member caps? movement transversely ci the exis ci cutting tool and having c work cer? in one tiiiecticn et en en, *ce the sheft corresponding to the angular. .l of the cutting tool with reference te the shaft, and Ineens for securing; :L le blank tc be cut on the surface of the tool ce rcr et en angle tc the direct-.ien of moticn of seid tool carrier and te tile axis cf 'the whereby moving the teef. carrier bodily der the cutter ineclienisin. causes it tc cui undercut iile teeth in 'the :File blank, for the purposes set forth.

5. in mechanism. cf che cisss clescribeci, :L rotatable file cutting tcel cf conical icrm, :ffx angulcr faced Work cern'm snbsizsntia f contacting the face ci" cnt .5, coi. and nievcnle tengentially the-reci. in ciirccticn parallel te she :mis of che cuttinc soci i T means 'Eer securing e i'iie te the cr. A se en angle to its clirecticc. c"z motion. en

the cerrier end to the cf tool whereby it will be the carrier is mcveci.

(i. in mechanism ci' class bese, s, siief pcreilei ieretc, s. i cutting tool carried by c* mit, c ions" having i plain upper su cc rcciprccctz transversely of the simi@ proximity but Without engagement Wizli scid tile c1 ting toc-i, and inclined ec correspon@` to ic engnlsrity of the file cutting tecl, and incr-ns for securing the ile blenir en salici toei cairryine; surfece at en :ingle to the 0:5 the ile cutting tool, for the purposes set fcrtli.

in Witness whereof il neve hereunto subn scribed my neme in 'the presence of t-Wc Witnesses.

' HARVEY described,

conical 

